1. Taking place by degrees
   - gradational, graduated

See also: gradual

• police force
• police headquarters
• police investigation
• police lieutenant
• police matron
• police officer
• police precinct
• police sergeant
• police squad
• police state
• police station
• police van
• police wagon
• police work
• policeman
• policeman bird
• policewoman
• policy
• policy change
• policy maker
• policy-making
• policyholder
• polio
• poliomyelitis
• Polioptila